Unless they are a must for concours, don't waste your time and money, buy new. I use KYB Gas-A-just on my 71 Mach with no issues.
I have a set of NOS D1ZZ-18124-E still in what's left of the boxes. No idea if they're any good mind you.
I might sell them if anybody is interested. They'd be cheaper than E-Pay!!
PM me if interested.
Geoff.